package com.zq.it.action;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.List;
import java.util.UUID;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper;

import com.alibaba.fastjson.JSONObject;
public class UploadBatchAction extends BaseAction {
	/**
	 */
	private static final long serialVersionUID = 1L;
	private static HashMap<String, String> extMap = new HashMap<String, String>();
	private static final long maxSize = 1000000L; // 文件大小
	public String getOrder() {
		return order;
	}

	public void setOrder(String order) {
		this.order = order;
	}

	public String getPath() {
		return path;
	}

	public void setPath(String path) {
		this.path = path;
	}

	private String order;
	private String path;

	public String getDir() {
		return dir;
	}

	public void setDir(String dir) {
		this.dir = dir;
	}

	private String dir;

	// 初始化map
	static {
		// 定义允许上传的文件扩展名
		extMap.put("image", "gif,jpg,jpeg,png,bmp");
		extMap.put("flash", "swf,flv");
		extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");
	}

	public void viewFiles() throws IOException {

		String rootPath = getRealPath("kindeditor-4.1.10/attached") + "/";
		String rootUrl = getRequest().getContextPath()
				+ "/kindeditor-4.1.10/attached/";
		String dirName = getDir();
		if (dirName != null) {
			if (!extMap.containsKey(dirName)) {
				getResponse().getWriter().println(getError("Invalid Directory name"));
				return;
			}
			// 访问文件
			rootPath += dirName + "/";
			rootUrl += dirName + "/";
			File saveDirFile = new File(rootPath);
			if (!saveDirFile.exists()) {
				saveDirFile.mkdirs();
			}
		}
		// 参数dir, path,order
		// 根据path参数，设置各路径和URL
		String d_path = path != null ? path : "";
		String currentPath = rootPath + d_path;
		String currentUrl = rootUrl + d_path;
		String currentDirPath = d_path;
		String moveupDirPath = "";
		if (!"".equals(d_path)) {
			String str = currentDirPath.substring(0,
					currentDirPath.length() - 1);
			moveupDirPath = str.lastIndexOf("/") >= 0
					? str.substring(0, str.lastIndexOf("/") + 1)
					: "";
		}
		// 排序形式，name or size or type
		String sort_order = order != null ? order.toLowerCase() : "name";
		// 不允许使用..移动到上一级目录
		if (path.indexOf("..") >= 0) {
			getResponse().getWriter().println("Access is not allowed.");
			return;
		}
		// 最后一个字符不是/
		if (!"".equals(d_path) && !d_path.endsWith("/")) {
			getResponse().getWriter().println("Parameter is not valid.");
			return;
		}
		// System.out.println("gfh"+currentDirPath);
		// 目录不存在或不是目录
		File currentPathFile = new File(currentPath);
		if (!currentPathFile.isDirectory()) {
			getResponse().getWriter().println("Directory does not exist.");
			return;
		}

		// 遍历目录取的文件信息
		List<Hashtable> fileList = new ArrayList<Hashtable>();
		// 得到文件列表

		if (currentPathFile.listFiles() != null) {
			for (File file : currentPathFile.listFiles()) {
				Hashtable<String, Object> hash = new Hashtable<String, Object>();
				String fileName = file.getName();
				if (file.isDirectory()) {
					hash.put("is_dir", true);
					hash.put("has_file", (file.listFiles() != null));
					hash.put("filesize", 0L);
					hash.put("is_photo", false);
					hash.put("filetype", "");
				} else if (file.isFile()) {
					String fileExt = fileName
							.substring(fileName.lastIndexOf(".") + 1)
							.toLowerCase();
					hash.put("is_dir", false);
					hash.put("has_file", false);
					hash.put("filesize", file.length());
					hash.put("is_photo", extMap.containsValue(fileExt));
					hash.put("filetype", fileExt);
				}
				hash.put("filename", fileName);
				hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
						.format(file.lastModified()));
				fileList.add(hash);
			}
		}

		if ("size".equals(sort_order)) {
			Collections.sort(fileList, new SizeComparator());
		} else if ("type".equals(sort_order)) {
			Collections.sort(fileList, new TypeComparator());
		} else {
			Collections.sort(fileList, new NameComparator());
		}

		JSONObject result = new JSONObject();
		result.put("moveup_dir_path", moveupDirPath);
		result.put("current_dir_path", currentDirPath);
		result.put("current_url", currentUrl);
		result.put("total_count", fileList.size());
		result.put("file_list", fileList);

		getResponse().setContentType("application/json; charset=UTF-8");
		getResponse().getWriter().println(result.toJSONString());
	}

	class NameComparator implements Comparator {
		@Override
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filename"))
						.compareTo((String) hashB.get("filename"));
			}
		}
	}
	class SizeComparator implements Comparator {
		@Override
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				if (((Long) hashA.get("filesize")) > ((Long) hashB
						.get("filesize"))) {
					return 1;
				} else if (((Long) hashA.get("filesize")) < ((Long) hashB
						.get("filesize"))) {
					return -1;
				} else {
					return 0;
				}
			}
		}
	}
	class TypeComparator implements Comparator {
		@Override
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filetype"))
						.compareTo((String) hashB.get("filetype"));
			}
		}
	}

	public void uploadBatch() throws IOException {

		// 文件保存目录路径
		String savePath = getRealPath("kindeditor-4.1.10/attached") + "/";
		// 文件保存目录URL
		HttpServletRequest request = getRequest();
		HttpServletResponse response = getResponse();
		String saveUrl = request.getContextPath()
				+ "/kindeditor-4.1.10/attached/";
		response.setContentType("text/html;charset=UTF-8");
		PrintWriter writer = response.getWriter();
		MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request;
		// 获取上传文件
		String[] fileNames = wrapper.getFileNames("imgFile");
		File[] files = wrapper.getFiles("imgFile");
		System.out.println(files.length);
		if (files.length <= 0) {
			writer.write(getError("请选择文件！"));
			return;
		}
		// 检查目录
		File uploadDir = new File(savePath);

		if (!uploadDir.isDirectory()) {
			writer.println(getError("上传目录不存在。"));
			return;
		}
		// 检查目录写权限
		if (!uploadDir.canWrite()) {
			writer.println(getError("上传目录没有写权限。"));
			return;
		}
		String dirName = getDir();
		if (dirName == null) {
			dirName = "image";
		}
		if (!extMap.containsKey(dirName)) {
			writer.println(getError("目录名不正确!"));
			return;
		}
		// 创建文件夹
		savePath += dirName + File.separator;
		saveUrl += dirName + "/";
		File saveDirFile = new File(savePath);
		if (!saveDirFile.exists()) {
			saveDirFile.mkdirs();
		}
		for (int i = 0; i < files.length; i++) {
			long fileSize = files[i].length();
			// 检查文件大小
			if (fileSize > maxSize) {
				writer.println(getError("上传文件大小超过限制。"));
				return;
			}
			// 检查扩展名
			String fileExt = fileNames[i]
					.substring(fileNames[i].lastIndexOf(".") + 1).toLowerCase();
			if (!Arrays.<String> asList(extMap.get(dirName).split(","))
					.contains(fileExt)) {
				writer.println(getError(
						"上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"));
				return;
			}
			String newFileName = UUID.randomUUID() + "." + fileExt;
			try {
				FileUtils.copyFile(files[i], new File(savePath, newFileName));
			} catch (Exception e) {
				writer.println(getError("上传文件失败。"));
				return;
			}

			JSONObject obj = new JSONObject();
			obj.put("error", 0);
			obj.put("url", saveUrl + newFileName);
			writer.println(obj.toJSONString());
		}
	}
	private String getError(String message) {
		JSONObject obj = new JSONObject();
		obj.put("error", 1);
		obj.put("message", message);
		return obj.toJSONString();
	}
}
